| 摘要 |
Means for controlling the heat sources of a cooking appliance, in particular of a cooking top, comprising a set of neighbouring heating sources (5) and a glass-ceramic panel (2) which is smooth and of uniform thickness and in particular covers the entire top, with a plurality of sensory buttons (10) actuated by the approach of the finger (11) of a user, in contact with or in the immediate vicinity of the surface of the panel. …<??>According to the invention, this means is characterised in that each button (10) is associated with a given source (5) and is constituted by the two metal armatures (15-16) arranged substantially in the same plane of a single capacitor supported by a printed circuit board (17) applied under the panel opposite its upper surface, the capacitor having its first armature (15) connected to a pulse generator and its second armature (16) to a differential comparator (23), the first, peripheral, armature having a U-shaped profile and surrounding the second, central, armature so that the approach of the finger at right angles to the capacitor but on the other side of the panel, close to or against its upper surface, modifies its capacitance and brings about, at the output of the differential comparator, a change of state which is capable of bringing about a variation in the electric supply voltage of the source associated with the button. …<IMAGE>… |
